Bobbin-winding machine



J. DALBY. BOBBIN WINDING MACHINE-l APPLICATION FILED FEB. 15. 1919.

Patented June 15, 1920.

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IN'SZENTUH MM KTI'DHNEY .T

v '1. DALBY. BOBBIN wmume MACHINE. I, APPLICATION FILED FEE. I5, 1919. '1,34 3,76 8 PatentedJune 15, 1920.

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' threads may be wound too hard or overlapi JOHN DALBY, 0F PAWTUCKET, RHODE ISLAND.

Specification of Letters Patent.

BOBBIN-WINDING MACHINE.

Patented June 15,1920.

Application filed February 15, 1919. Serial No. 277,200.

To all whom it may concern:

Be itknown that I, J OHN DALBY, a subject of Great Britain, residing at Pawtucket, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Bobbin-finding Machines, of which the following is a specification.

My invention has reference to an improvement in bobbin winding machines and more particularly to an improvement in bobbin winding machines for winding bobbins for lace looms.

In the usual construction of bobbinwinch ing machines for winding lace loom bobbins the threads go around a felt covered tension drum and are then wound on the bobbins which are on a square removable shaft driven by a belt and pulley. The tension on the threads is controlled by a hand op erated tension device on the tension drum. In the use of the hand tension controlled machines it has been found practically impossible to uniformly windtwo sets of bobbins having the required tension, as no two operators, operating the tension by hand, are able to give the same tension to the threads wound on the bobbins. been found that even the same operator will vary the tension from that required to give the best result in the loom. With the hand operated tension the threads are usually wound uneven in the bobbin, a greater tensection of the cam end of the automatic tension may be given at the periphery when the greatest tension should be at the hub and gradually diminish t0 the periphery, or the causing the thin sides of the bobbin to. bulge out and when the bobbin is heated and comcause breaking of the beam threads in the.

loom.

The object of my invention is to improve the construction of a bobbin winding machine for winding lace loom bobbins, whereby the tension on the threads is governed automatically, and when the automatic tension device is 'set for a prede- In practice it has termined tension, the tension on the threads is thereafter controlled by the automatic tension device and the human element for this purpose eliminated.

A further object of my invention is to improve the construction of a bobbin winding machine for winding lace loom bobbins, whereby the automatic tension device will govern the tension so that the tension on the threads will be the greatest at the hub and gradually diminish to the periphery and that each set of 120 to 140 bobbins when wound, will all have the same required ten- S1011.

My invention consists in the peculiar and novel construction of a bobbin winding machine for winding lace loom bobbins, said machine having an automatic bobbin winding tension mechanism and details of con struction, as will be more fully set forth hereinafter and claimed.

Figure 1 is a side view of a lace loom bobbin winding machine provided with my improved automatic bobbin tension controlling mechanism.

Fig. 2 is a diagrammatic figure illustrat ing the method of carrying the threads through the bobbin winding machine to the bobbins.

Fig. 3 is an enlarged side view partly in section, of the spring end of the automatic tension controlling mechanism.

Fig. 1 is an enlarged side view partly; in

sion controlling mechanism.

F 1g. 5 is a side new of a lace loom bobbin, and

Fig. 6 is edge View of the lace loom bobbin. pressed to the required thinness, the threadswill gum up and break. By increasing the In the drawings 7 indicates the bed of the .machine at one end of which are uprights, 8.8 only one of which is shown.

Each 8 has a bearing for a shaft 9 to which is secured a felt covered transverse tension drum 10, a brake drum 11, and a worm gear 12, shown in broken lines in Fig. 1. Each up right 8 also has bearings 13.13 which rotatably support transverse rolls 14.14, an extension 15 which supports transverse rods 16.16 and a transverse reed 17 at each side of the rolls 14.14:. A cam shaft 18 is rotatably supported in bearings 19 in a support on the bed 7. Secured to the cam shaft 18 is a worm 20, shown in broken lines in Fig. 1, a pinion 21 and acarn 22 have a one turn helical. cam groove 23, which begins near the center and ends near the periphery of the cam,as shown in Fig. o l. A clutch,-not

shown, is interposed between the camshaft 1 8 and the worm 20. A, segmental gear 2% is pivotally secured to a bearing on the bed 7, it meshes with the pinion 21 andhas a handle 26 by which the cam 22 is reversed.

'A shaft 27 is 'rotatably supported one end in a bearing 28 on the upright 8 and at the other end in a bearin 29 shown in.

b 7 broken lines on the su'aport 'wlnchcarrres" the bearing 19 on the bed 7. A worm 30, on the shaft 2'; meshes with theworm gear 12 on the shaft 9and a worm gear 31 on the shaft 27 meshe's with the worm 20-011 the cam shaft 18, thereby driving the cam shaft" 18 from the shaft The worm 30 and worm gear 31 are shown in broken lines in Fig. l. The ratio of gearingbetween the shafts't) and 18 is such'thatthe cam 22 makes one revolution in one winding" of the bobbins; A brake lever-32 is pivotally "selcured at its lower end to a bearing 33 on the bed 7 an d'has a shoe 34infrir-tional"" and ahole 35 in its'upper en'd'. A red 36 is-conengagement with the brake drum structed to havea shoulder 37and a reduced end portion 38 which extends throughthe hole 35 in the brake lever 32. A collar 39 is slidably supported on the end portion 38' and 'a heavy coiled spring L0 on'tbe portion 38 is in spring engagement'with the collar 39 and the brake lever 32. A collar 41 is adjustably secured to the rod 36 by a bolt 42 and a light coiled spring d3zis in spring engagement with the collar 39 and Wl'ljllflG movable collar 42, as shown iii Fig. A roll member {A has a slot 45 for the cam shaft 18, a roll 46, which enters the cam groove'23, as shown in broken lines in Fig.

4:, an end bore 47 into which the end atSof' the rod 36 extends and in which it is adustably secured by a bolt 49. A'bobb n shaft 50 having a pulley and asquare portion, is rotatably supportedindJezu'ings; As shown inl ig. 5 the 52 on the bed '7. bobbin 53 has a square central hole 54 by which it is detachably secured to the bobbin shaft 50, the square portion of whichis (le tachable; The cam 22, collar 39 and springs 40 and 43 are shown in the position they would assume atthe beginning of winding the one hundred and twenty to one hundred and forty bobbins, which are wound'atone time. 7 p

In theoperation of my improved bobbin winding machine, the required tension is obtained on the threads 55, by adjusting the rod 36 in the bore 47' and the collar 461 on the rod 36. The threads 55 come from a jack, not shown, then between the rods 16, 16, through the first reed 17, over the first roll len then around the tension drum 10,- then over the second roll 1%, and through the second reed 17 to the bobbins 53.53 as that'is-tmsay, the threadhas the greatest shown in Fig. 2, in which they are wound,

by the pulley 51 on the bobbin shaft. At thebeginning of the winding both of the springs 40 and 43 are compressed with the collar 39 against the shoulder 37 of the rod .36. The heavy spring 40 is now exerting its greatest tension or pressure on the lever 32 and -brakeshoe ia t' thereby giving the greatest friction on the brake drum 11 and greatest tension on the threads 5555 as they' 'are wound-on the bobbins; As the cam 22 turns the direction of the' arrow shown in- Fig. 4, the rod 36 moves toward l the cam and the heavyspringeOdengthening l out, gradually reduces its pressure on the "lever "32' until it reaches its-limitef' expznfr sion when it blends with the light spring which acting on the collar 39, which now leaves the shoulder 37-, comes into action and through the lengthening of the light spring 5 1 43 graduallyreduces the tensionon the threads to the end of the windingw' The full 'bobbinsfare' then replaced by empty"- bobbins'aiid the cam reversed "by'the 11 mental gear 2d, thereby placing the springs 9 40 and 43*again under'the requiredvarying tension for windingt-h'e'next set ofbobbinsfi By the use of my improved bobbin wind? ing machine for winding the brassb'obbins used 111 12108 looms,e'ach bobbin 1s woundunder the same requlred varylngy tension,

tension atthe hub which tension gradually" diminishes to the per1phery"'of the bobb1'n,*

and the threads in allot the different sets of bobbins, wound 'at-difier'ent times,- all have the same required t'ension,"which has been proved to be impossiblewhere the tension is manuallycontrolled during the Windingheretoforefl-The thread-may be increased in length in each bobbin t'en or more per v cent, a material reduction in threading is ob the shaft, a brake drum securedto the shaft,

a brake lever pivotallysecured to the bed and having a brake shoe frictionally engaging the brakejdrum, acam shaftrotat ably sup ported on the bed, a cam securerlto 'the-cam shaft, means operatively connecting the cam with the brake lever' jvh'ereby thebra'ke'shoe125 exerts a,gradually diminishing frictional 're- 1 sistance'on the brake drum reversing the cam. 1 V r r 2. In amachine for Winding thebobbinS of lace looms, bed, a shaftrotatably sup .130

and means for ported on the bed, a tension drum secured to the shaft, a brake drum secured to the shaft, a brake lever pivotallysecured to the bed and having a brake slioe frictionally engaging the brake drum, a cam shaft rotatably supported on the bed, a cam secured to the cam shaft, means operatively connecting the tension drum shaft with the cam shaft for rotating the cam, means operatively connecting the cam with the brake lever whereby the brake shoe'exerts a gradually diminishing frictional resistance on the brake drum and means for giving a retrograde movement to the cam.

3. In a machine for winding the bobbins of lace looms, a bed, a bobbin winding shaft rotatably supported on the bed, means for holding a plurality of lace loom bobbins on the shaft, means for revolving the shaft, a tension drum shaft rotatably supported on the bed, a tension drum and a brake drum secured to the shaft, a brake lever pivotally secured to the bed and having a brake shoe frictionally engaging the brake drum, a cam shaft rotatably supported on the bed, a cam secured to the cam shaft, means operatively connecting the tension drum shaft with the cam shaft for rotating the cam, means operatively connecting the cam with the brake lever whereby the brake shoe 6X- erts a gradually diminishing frictional resistance on the brake drum and means for giving a retrograde movement to the cam.

t. In a machine for winding the bobbins of lace looms, a bed, a tension drum shaft rotatably supported on the bed, a tension drum and a brake drum secured to the shaft, a brake lever pivotally secured to the bed and having a brake shoe frictionally engaging the brake drum, a cam shaft rotatably supported on the bed, a cam having a helical cam groove and secured to the cam shaft, means operatively connecting the tension drum shaft with the cam shaft to rotate the cam, a rod having a roll engaging with the cam groove in the cam, a shoulder and a reduced end extending through a hole in the brake lever, a loose collar on the reduced end, a heavy coiled spring intermediate the loose collar and the brake lever, a collar secured to the rod, a light coiled spring intermediate the fast and loose collars, whereby the brake shoe exerts a gradually diminishing fric-- tional resistance on the brake drum and means for giving a retrograde movement to the cam.

5. An automatic tension controlling mechanism for lace loom bobbin winding machines comprising a cam having a helical groove, a brake drum on the shaft of the tension drum, a brake lever having a brake shoe frictionally engaging the brake drum, a member having a'roll engaging with the ram groove in the cam, a rod having a shoulder and a reduced end extending through a hole in the brake lever, a loose collar on the reduced end, a heavy coiled spring interme diate the brake lever and the loose collar, an adjustable collar on the rod, means for adjustably securing the collar to the rod, a light coiled spring intermediate the loose and fast collars, means for adjustably securing the rod to the roll member, means for rotating the cam, and means for giving a retrograde movement to the cam, whereby the brake shoe exerts a gradually diminishing frictional resistance on the brake drum.

6. The combination with a lace loom bob bin winding machine of a cam shaft, a cam having a helical cam groove on the cam shaft, a brake drum on the tension drum shaft of the machine, a brake lever having a brake shoe frictionally engaging the brake drum, means for rotating the cam shaft, means for giving a retrograde movement to the cam and means operatively connecting the cam with the brake lever, whereby the brake shoe eX- erts a gradually diminishing frictional resistance on the brake drum.

In testimony whereof, I have signed my name to this specification.

JOHN DALBY. 

